TWI564511B - Heat dissipation fin set - Google Patents

Description

Heat sink fin set

The present invention relates to a heat dissipation module, and more particularly to a heat dissipation fin set.

Electronic products typically use heat sink fin sets to increase the efficiency with which electronic components transfer thermal energy to the outside environment to reduce the operating temperature of the electronic components. In the case of a light emitting diode (LED) luminaire, the use of a fan forced cooling method consumes additional energy and generates noise. Therefore, the current illuminating diode lamp uses a heat sink fin group for heat dissipation. It transmits the thermal energy generated by the light-emitting diode light source to the external environment through the natural convection and heat radiation mechanism.

As the wattage of the light-emitting diode lamp is increased, the heat dissipation efficiency can be enhanced by increasing the number of heat-dissipating fins and increasing the heat-dissipating fin area. However, the disadvantage is that more materials are required to cause an increase in cost. In addition, in the case that the overall structure of the light-emitting diode lamp has a volume limitation, the more the number of heat-dissipating fins, the narrower the air flow path between the adjacent heat-dissipating fins, so that the flow of the heat-dissipating fins The airflow is subjected to a large resistance, and the spacing between the adjacent heat dissipation fins is too small, so that the heat radiation efficiency of each heat dissipation fin is lowered, thereby reducing the heat dissipation efficiency. On the other hand, the larger the area of the heat sink fins, the larger the space occupied by the light-emitting diode lamps is, which is not advantageous for indoor lighting applications.

The invention provides a heat dissipation fin set, which can improve heat dissipation efficiency and has a small volume.

The heat dissipation fin set of the present invention comprises a base and a plurality of heat dissipation fins. The heat dissipation fins are disposed on the base, and each of the heat dissipation fins has a first section and a second section connected to each other, and the area of the first section is larger than the area of the second section. The heat dissipation fins include a plurality of first heat dissipation fins and a plurality of second heat dissipation fins, and the first heat dissipation fins and the second heat dissipation fins are staggered with each other. The first segment pair of each first heat dissipation fin is located in the second segment of the adjacent second heat dissipation fin, and the second segment pair of each first heat dissipation fin is located on the adjacent second heat dissipation fin The first section.

In an embodiment of the invention, each of the heat dissipation fins has at least one heat dissipation surface, and the heat dissipation fins are sequentially arranged along a direction perpendicular to each of the heat dissipation surfaces, and an area of each of the heat dissipation surfaces in the first section is larger than each The area of the portion of the heat dissipating surface in the second section.

In an embodiment of the invention, the ratio of the area of each of the heat dissipating surfaces in the first section to the area of the heat dissipating surface in the second section is between 1.5 and 6.

In an embodiment of the invention, the pedestal has a connecting surface, and the connecting surface includes an adjacent first region and a second region, and the first segment and the second heat dissipation of each of the first heat dissipation fins The second section of the fin is connected to the first area, and the second section of each of the first heat dissipation fins and the first section of each of the second heat dissipation fins are connected to the second area.

In an embodiment of the invention, a distance between the first segment of each of the first heat dissipation fins and the first segment of the adjacent other first heat dissipation fin is greater than each of the first heat dissipation fins The spacing between adjacent second heat sink fins.

In an embodiment of the present invention, the first segment pair of each of the first heat dissipation fins is located in the first segments of the other first heat dissipation fins, and the second segment pair of each of the first heat dissipation fins Located in these second sections of the other first fins.

In an embodiment of the invention, the heat dissipation fins have the same outer shape and dimensions.

In an embodiment of the invention, each of the heat dissipation fins has a triangular shape.

In an embodiment of the invention, the pedestal has a connecting surface, and the connecting surface is a flat surface, and the heat dissipating fins are connected to the connecting surface and are sequentially arranged in a line direction.

In an embodiment of the invention, the base has a connecting surface, and the connecting surface is an annular surface, and the heat radiating fins are connected to the connecting surface to surround the base.

Based on the above, in the heat dissipation fin set of the present invention, the first heat dissipation fin and the second heat dissipation fin are staggered with each other, and the first and second sections of the first heat dissipation fin are respectively located in the second heat dissipation a second section and a first section of the fin. Accordingly, the two first sections of the adjacent two heat dissipating fins having a large area are disposed in such a manner that they are displaced from each other, so that the two first sections do not align with each other to form a narrow air flow path therebetween. In this way, the resistance of the airflow flowing through the heat dissipation fin group can be effectively reduced, and the heat dissipation efficiency of each heat dissipation fin can be reduced by avoiding that each first section is too close to the other first section, thereby improving the heat dissipation effect. Further, since the heat dissipation fin group of the present invention can effectively improve the heat dissipation efficiency by the above configuration, the number and the area of the heat dissipation fins are not excessively increased for the heat dissipation effect, so that the heat dissipation fin group can be reduced. The effect of the volume.

The above described features and advantages of the invention will be apparent from the following description.

1 is a perspective view of a heat dissipation fin set according to an embodiment of the present invention. 2 is a front elevational view of the heat sink fin set of FIG. 1. Referring to FIG. 1 and FIG. 2 , the heat dissipation fin assembly 100 of the present embodiment includes a base 110 and a plurality of heat dissipation fins 120 . The heat dissipation fins 120 are disposed on the susceptor 110. Each of the heat dissipation fins 120 has a first segment S1 and a second segment S2 connected to each other. The area of the first segment S1 is larger than the area of the second segment S2. . In this embodiment, the heat dissipation fins 120 have the same outer shape and size, and are triangular, and the first and second segments S1 and S2 of the heat dissipation fins 120 are defined by the center of the base 110. (marked as the boundary line L) to divide. In other embodiments, each of the heat dissipation fins may have other suitable shapes and sizes, which are not limited by the present invention.

The heat dissipation fins 120 include a plurality of first heat dissipation fins 120a (shown as seven in FIG. 1) and a plurality of second heat dissipation fins 120b (shown as six in FIG. 1). The first heat dissipation fins 120a and the second heat dissipation fins 120b are staggered with each other as shown in FIG. That is, a second heat dissipation fin 120b is disposed between the adjacent two first heat dissipation fins 120a, and a first heat dissipation fin 120a is disposed between the adjacent two second heat dissipation fins 120b. The first heat dissipation fins 120a and the second heat dissipation fins 120b are staggered in opposite directions as shown in FIGS. 1 and 2, so that the first sections S1 of the first heat dissipation fins 120a are positioned opposite each other. The second segment S2 of the adjacent second heat dissipation fins 120b and the second segment S2 of each of the first heat dissipation fins 120a are located in the first segment S1 of the adjacent second heat dissipation fins 120b.

According to the above design, the two first segments S1 having large areas of the adjacent two heat dissipation fins 120a and 120b are disposed in such a manner that they are displaced from each other, so that the two first segments S1 do not align with each other. A narrow air flow path is formed therebetween, so that the resistance of the airflow flowing through the heat dissipation fin group 100 can be effectively reduced, and each of the first sections S1 can be prevented from being too close to the other first section S1 to reduce the heat dissipation fins. The heat radiation efficiency of 120, thereby improving the heat dissipation effect. Specifically, referring to FIG. 1 , the distance D1 between the first segment S1 of each first heat dissipation fin 120 a and the first segment S1 of another adjacent first heat dissipation fin 120 a is greater than each first heat dissipation. The distance D2 between the fins 120a and the adjacent second heat dissipation fins 120b, so that the gap D1 constitutes a wider air flow path to reduce the fluid resistance, and the heat energy radiated by each of the first sections S1 is directly The ratio of absorption by the other first section S1 is also reduced, and the effect of heat convection and heat radiation is enhanced. Further, the heat dissipation fin assembly 100 of the present embodiment can effectively improve the heat dissipation efficiency by using the above configuration manner, without excessively increasing the number and area of the heat dissipation fins 120 for the heat dissipation effect, thereby reducing the heat dissipation fins. The effect of the volume of the set 100.

The specific structure and arrangement of the heat dissipation fin set 100 will be described in more detail below. In this embodiment, each of the heat dissipation fins 120 has a heat dissipation surface 122, and the heat dissipation fins 120 are sequentially arranged in a direction V perpendicular to the heat dissipation surfaces 122. The area of each of the heat dissipating surfaces 122 in the portion 122a of the first section S1 is larger than the area of the portion 122b of each of the heat dissipating surfaces 122 in the second section S2. For example, the ratio of the area of each of the heat dissipating surfaces 122 in the portion 122a of the first section S1 to the area of each of the heat dissipating surfaces 122 in the portion 122b of the second section S2 can be designed to be between 1.5 and 6 or other suitable ratio range. The invention is not limited thereto.

The pedestal 110 has a connecting surface 112 (shown in FIG. 2), and the connecting surface 112 includes an adjacent first region 112a and a second region 112b. The first section S1 of each of the first heat dissipation fins 120a and the second section S2 of each of the second heat dissipation fins 120b are connected to the first region 112a of the connection surface 112, and the second section of each of the first heat dissipation fins 120a The first segment S1 of S2 and each of the second heat dissipation fins 120b is connected to the second region 112b of the connection surface 112. Accordingly, the first segment S1 of each of the first heat dissipation fins 120a is opposite to the first segments S1 of the other first heat dissipation fins 120a, and the second segment S2 of each of the first heat dissipation fins 120a is located at the other. The first sections S2 of the first heat dissipation fins 120a, the first sections S1 of the second heat dissipation fins 120b are located in the first sections S1 of the other second heat dissipation fins 120b, and each of the second sections S1 The second section S2 of the heat dissipation fins 120b is located at the second sections S2 of the other of the second heat dissipation fins 120b.

The present invention does not limit the shape of each heat dissipating fin, and the following is exemplified by the drawings. 3A to 3D are front views of a heat sink fin group according to another embodiment of the present invention. In the heat dissipation fin sets 200, 300, 400, and 500 of FIG. 3A to FIG. 3D, the configurations of the susceptors 210, 310, 410, and 510 are similar to those of the susceptor 110 of FIGS. 1 and 2, and the heat dissipation fins are disposed. The first heat dissipation fins 220a, 320a, 420a, and 520a and the second heat dissipation fins 220b, 320b, 420b, and 520b included in 220, 320, 420, and 520 are arranged in a manner similar to that of the heat dissipation fins 120 of FIGS. 1 and 2. The arrangement of the first heat dissipation fins 120a and the second heat dissipation fins 120b is not described here.

The difference between the embodiment shown in FIG. 3A and FIG. 3D and the embodiment shown in FIG. 1 and FIG. 2 is that the heat dissipation fins 120 shown in FIG. 1 and FIG. 2 are right triangles, and the heat dissipation fins shown in FIG. 3A and FIG. 3B are shown. The fins 220 and 320 are not rectangular triangles. Each of the heat dissipation fins 420 shown in FIG. 3C has a trapezoidal shape, and each of the heat dissipation fins 520 shown in FIG. 3D has a polygonal shape. In other embodiments, each of the heat dissipation fins may be designed in other suitable shapes, which is not limited by the present invention.

In the embodiment shown in FIG. 1 and FIG. 2, the connecting surface 112 of the susceptor 110 is a flat surface, and the heat dissipating fins 120 are connected to the connecting surface 112 and sequentially arranged in the linear direction V. However, the present invention is not limited thereto, and the following is exemplified by the drawings. 4 is a perspective view of a heat sink fin set applied to a light emitting diode lamp according to another embodiment of the present invention. Please refer to FIG. 4 , the heat dissipation fin set 600 of the embodiment is integrated into the lamp holder 52 of the LED lamp 50 (for example, a light-emitting diode bulb), and is mounted on the heat dissipation fin set 600 . The light source 54 dissipates heat, and the light source 54 includes a lamp cover 54a and a light emitting diode element located in the lamp cover 54a. In the heat dissipation fin set 600 of FIG. 4, the first heat dissipation fins 620a and the second heat dissipation fins 620b included in the 610 and the heat dissipation fins 620 are arranged in a manner similar to the susceptor 110 of FIG. 1 and FIG. The arrangement of the first heat dissipation fins 120a and the second heat dissipation fins 120b included in the fins 120 will not be described herein.

The heat dissipation fin set 600 is different from the heat dissipation fin set 100 in that the connection surface 612 of the base 610 is an annular surface, and the heat dissipation fins 620 are connected to the connection surface 612 to surround the base 610. In the case where the connecting surface 612 is an annular surface instead of a flat surface, the heat radiating fins 620 connected to the annular surface are not arranged in parallel with each other, so that the spacing between the adjacent heat radiating fins 620 can be further increased, which is more advantageous. The heat convection and heat radiation efficiency of the heat sink fin group are improved. In other embodiments, the heat sink fin set can be applied to heat generating components of various electronic devices, which is not limited by the present invention.

FIG. 5 illustrates a heat dissipation airflow generated by the heat dissipation fin assembly of FIG. 4. Further, by disposing the first heat dissipation fins 620a and the second heat dissipation fins 620b of the heat dissipation fin set 600 in opposite directions, in addition to generating a heat dissipation airflow F1 (shown in FIG. 5) from the first The heat dissipation fins 620a flow down to the heat dissipation fin group 600, and the heat dissipation airflow F2 (shown in FIG. 5) flows from the side of the second heat dissipation fins 620b to the heat dissipation fin group 600, thereby improving heat dissipation efficiency.

The following are the heat dissipation fin sets 600 of the present embodiment (the heat dissipation fins are staggered in opposite directions) and the conventional heat dissipation fin sets (the heat dissipation fins are not staggered in opposite directions) are applied to the heat dissipation of the LED lamp. Ability comparison table.         <TABLE border="1" borderColor="#000000" width="_0002"><TBODY><tr><td> Number of fins</td><td> Fins are staggered in opposite directions</td> <td> Lamp input power</td><td> Maximum lamp temperature</td><td> Thermal resistance (<img wi="40" he="38" file="02_image001.jpg" img-format=" Jpg"></img>) </td></tr><tr><td> 36 </td><td> None</td><td> 8 W </td><td> 66.88 °C < /td><td> 5.24 °C/W </td></tr><tr><td> 36 </td><td> Yes</td><td> 8 W </td><td> 62.00 °C </td><td> 4.63 °C/W </td></tr><tr><td> 36 </td><td> None</td><td> 12 W </td><td > 80.47 °C </td><td> 4.62 °C/W </td></tr><tr><td> 36 </td><td> Yes </td><td> 12 W </td> <td> 75.34 °C </td><td> 4.20 °C/W </td></tr></TBODY></TABLE>

As can be seen from the above table, in the case of different lamp input powers (listed as 8 W or 12 W), the present embodiment is arranged in the opposite direction of the heat dissipating fin set 600, and the measured lamp has the highest lamp. The temperature and thermal resistance values are lower than the thermal resistance values measured by the heat dissipating fin groups that are not staggered in opposite directions. The lower the maximum temperature of the measured luminaire, the better the heat dissipation effect. In addition, the thermal resistance R _ja is defined as Where T _j is the temperature of the light-emitting diode element, T _a is the ambient temperature, and P _H is the input power. That is, the lower the measured thermal resistance value, the better the heat dissipation effect.

In summary, in the heat dissipation fin set of the present invention, the first heat dissipation fin and the second heat dissipation fin are staggered with each other, and the first and second sections of the first heat dissipation fin are respectively located at the same a second section and a first section of the heat dissipation fin. Accordingly, the two first sections of the adjacent two heat dissipating fins having a large area are disposed in such a manner that they are displaced from each other, so that the two first sections do not align with each other to form a narrow air flow path therebetween. In this way, the resistance of the airflow flowing through the heat dissipation fin group can be effectively reduced, and the heat dissipation efficiency of each heat dissipation fin can be reduced by avoiding that each first section is too close to the other first section, thereby improving the heat dissipation effect. Further, since the heat dissipation fin group of the present invention can effectively improve the heat dissipation efficiency by the above configuration, the number and the area of the heat dissipation fins are not excessively increased for the heat dissipation effect, so that the heat dissipation fin group can be reduced. The effect of the volume. In addition, in the case where the connection surface of the pedestal is an annular surface instead of a plane, the heat dissipation fins connected to the annular surface are not arranged in parallel with each other, so that the spacing between adjacent heat dissipation fins can be further increased. It is more conducive to the heat convection and heat radiation efficiency of the heat dissipation fin group.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

50‧‧‧Lighting diode lamps

52‧‧‧ lamp holder

54‧‧‧Light source

54a‧‧‧shade

100, 200, 300, 400, 500, 600‧‧‧ heat sink fin sets

110, 210, 310, 410, 510, 610‧‧ pedestals

112, 612‧‧‧ connection surface

112a‧‧‧First area

112b‧‧‧Second area

120, 220, 320, 420, 520, 620‧‧‧ heat sink fins

120a, 220a, 320a, 420a, 520a, 620a‧‧‧ first heat sink fins

120b, 220b, 320b, 420b, 520b, 620b‧‧‧ second heat sink fin

122‧‧‧heating surface

122a, 122b‧‧‧ part of the heat sink

D1, D2‧‧‧ spacing

F1, F2‧‧‧ cooling airflow

L‧‧‧ boundary

S1‧‧‧ first section

S2‧‧‧Second section

V‧‧‧ direction

1 is a perspective view of a heat dissipation fin set according to an embodiment of the present invention. 2 is a front elevational view of the heat sink fin set of FIG. 1. 3A to 3D are front views of a heat sink fin group according to another embodiment of the present invention. 4 is a perspective view of a heat sink fin set applied to a light emitting diode lamp according to another embodiment of the present invention. FIG. 5 illustrates a heat dissipation airflow generated by the heat dissipation fin assembly of FIG. 4.

100‧‧‧Fixing fin set

110‧‧‧Base

120‧‧‧Heat fins

120a‧‧‧First heat sink fin

120b‧‧‧second heat sink fin

122‧‧‧heating surface

122a, 122b‧‧‧ part of the heat sink

D1, D2‧‧‧ spacing

L‧‧‧ boundary

S1‧‧‧ first section

S2‧‧‧Second section

V‧‧‧ direction

Claims (10)

A heat dissipation fin assembly includes: a base; and a plurality of heat dissipation fins disposed on the base, wherein each of the heat dissipation fins has a first section and a second section connected to each other The area of the first section and the second section of each of the heat dissipation fins are connected to the base, wherein the heat dissipation fins comprise a plurality of first heat dissipation a fin and a plurality of second heat dissipating fins, wherein the first heat dissipating fins and the second heat dissipating fins are staggered with each other, and the first pair of the first heat dissipating fins are located adjacent to the first fin The second section of the second heat dissipation fin, and the second section of each of the first heat dissipation fins is located in the first section of the adjacent second heat dissipation fin. The heat-dissipating fin set of claim 1, wherein each of the heat-dissipating fins has at least one heat-dissipating surface, and the heat-dissipating fins are sequentially arranged in a direction perpendicular to each of the heat-dissipating surfaces, wherein the heat-dissipating surface is The area of the portion of the first section is greater than the area of the portion of the heat dissipating surface at the second section. The heat dissipation fin set according to claim 2, wherein a ratio of an area of each of the heat dissipation surfaces in the first section to an area of each of the heat dissipation surfaces in the second section is 1.5 ~6. The heat sink fin set of claim 1, wherein the base has a connecting surface, the connecting surface includes an adjacent first region and a second region, and the first heat sink fins a first segment and the second region of each of the second heat dissipation fins The segment is connected to the first region, and the second segment of each of the first heat dissipation fins and the first segment of each of the second heat dissipation fins are connected to the second region. The heat dissipation fin set according to claim 1, wherein the first section of each of the first heat dissipation fins and the first section of the adjacent one of the first heat dissipation fins The spacing is greater than the spacing between each of the first heat dissipation fins and the adjacent second heat dissipation fins. The heat dissipation fin set of claim 1, wherein the first segment pair of each of the first heat dissipation fins is located in the first segments of the other first heat dissipation fins, each of the first The second segment pair of a heat dissipation fin is located in the second segments of the other first heat dissipation fins. The heat dissipation fin set according to claim 1, wherein the heat dissipation fins have the same outer shape and size. The heat dissipation fin set according to claim 1, wherein each of the heat dissipation fins has a triangular shape. The heat sink fin set of claim 1, wherein the base has a connecting surface, and the connecting surface is a flat surface, and the heat radiating fins are connected to the connecting surface and arranged in a line direction. The heat sink fin set according to claim 1, wherein the base has a connection, and the connection is an annular surface, and the heat dissipation fins are connected to the connection surface to surround the base.